Todo due date fix & custom tasks

🔧 Fix adding due date to todo tasks

Fixed a bug that prevented adding due dates to todo tasks created from emails. You can now properly set deadlines and reminders for all your tasks.

➕ Custom tasks in kanban board

You can now create custom tasks directly in the kanban board that aren’t tied to any email. Perfect for tracking standalone projects, personal reminders, or any task that doesn’t originate from your inbox. Your kanban board is now a complete task management system.